On 23rd of March 2017, Peter Eisentraut committed patch: Logical replication support for initial data copy Add functionality for a new subscription to copy the initial data in the tables and then sync with the ongoing apply process. For the copying, add a new ...

On 27th of February, Heikki Linnakangas committed patch: Add support for piping COPY to/from an external program. This includes backend "COPY TO/FROM PROGRAM '...'" syntax, and corresponding psql \copy syntax. Like with reading/writing files, the backend version is superuser-only, and in the psql version, ...